Method and apparatus for deviating conductor casing

ABSTRACT

A method and apparatus for deviating conductor casing, or the like, as it is being driven into a substratum. The conductor casing has an enclosed beveled end, or a partial enclosed beveled end providing an opening for the emission high pressure fluid fed from the surface.

United States Patent Rees et a1. Aug. 12, 1975 [54] METHOD AND APPARATUSFOR 2,324,102 7/1943 Miller et a1. 175/61 X DEVlATING CONDUCTOR CASING2,783,972 3/1957 Fehlmann 3,474,630 10/ 1969 Pogonowskl [75] lnventors:Thomas E. Rees, Tulsa, Okla; 3521405 3 1970 Coyne et a1 Frank D. Priebe,Houston, Tex. 3,610,346 10/1971 Ziober 3,670,507 6/1972 Mott et a1. [731Assgneel Company Tulsa 3,687,204 8/1972 Marshall 175/9 Okla.

[22] Filed; Man 15 97 Primary Examiner-Frank L. Abbott Appl. No.:451,614

References Cited UNITED STATES PATENTS 3/1933 Dana et a1. 175/9Assistant ExaminerRichard E. Favreau Attorney, Agent, or FirmJohn W.Carpenter ABSTRACT 24 Claims, 4 Drawing Figures METHOD AND APPARATUS FORDEVIATING CONDUCTOR CASING BACKGROUND OF THE INVENTION 1. Field of theInvention This invention relates to conductor casing of oil wells. Morespecifically, this invention provides a method and apparatus fordeviating conductor casing as it is being driven into the substratum.

2. Description of the Prior Art There are many conventional means in theart of exploratory drilling of off-shore wells from platforms whichexpeditiously provide for many exploratory and- /or producing wells tobe drilled from each platform. A popular method is the utilization ofcurved or slanted well conductors. This method essentially doubles theacreage that can be reached when drilling from a single platformstructure.

In accordance with such popular prior art method, conductors have eitherbeen driven at a slant while the conductor remains uncurved, or theconductors have been precurved prior to their being driven into thesubstratum. Conductors have also been conventionally slanted or curvedduring driving by forcing the conductors through a gamut of offset guidemembers attached to the substructure of the platform. The guide membersare positioned such as to have a general arcuate center line along thecommon axis of the respective guide members. These popular prior artmeans for deviating conductor casing are deficient because of notrendering versatility in drilling plans, and the amount of curvaturethat can be obtained in the conductor casing is somewhat limited. Byutilizing conventional curving methods, the position of the guidemembers have to be preplanned when the platform is constructed and onnumerous occasions, depending on what has been discovered in earlydrilling operations, drilling plans have been altered after drilling hasbeen commenced. Therefore, what is needed and what has been invented byus is a method and apparatus for deviating conductor casing, or thelike, without the foregoing deficiencies associated with the prior artmethods and apparatuses.

SUMMARY OF THE INVENTION The present invention accomplishes its desiredobjects by broadly providing an apparatus and method for deviatingconductor casing, or the like. The apparatus comprises a drilling deckhaving at least one drilling aperture situated above an offshore body ofwater, at least one leg supportably attached to the drilling deck andextending downwardly to the bottom of the body of water, and a pilemeans slideably guided by at least one leg and connected to thestructure for imbedding in a substratum of a body of water to rigidlysecure the structure in place. At least one first conductor casing isslideably situated within a drilling aperture for insertion and bendingbeneath the bottom and in the substratum; the first conductor casingincludes a structure defining a conduit having a beveled end and a shoemember attaching to the beveled end and entirely covering the openingthereof. Alternatively, the first conductor casing may include astructure defining a conduit having a beveled end, a partial shoe memberattaching to the beveled end leaving an opening for internalcommunication with respect to the insides of the first conductor, and ajet means extending internally down the first conductor for feedingliquid from the surface through the opening at a high pressure forsupplementing the deviation of the first conductor beneath the bottomand in the substratum. The method for deviatingthe conductor casing, orthe like, comprises installing the anchored marine structure, extendingthe first conductor casing through the drilling aperture and downwardlyrelative to the drilling deck until contacting the bottom, and drivingthe beveled end of the first conductor casing beneath the bottom andinto the substratum for bending therein. When the alternate structure ofthe first conductor is utilized, the method also additionally comprisesextending a jet means internally down the first conductor for feedingliquid from the surface through the opening to supplement deviation ofthe first conductor beneath the bottom and in the substratum.

It is therefore an object of the present invention to provide a methodand apparatus for deviating conductor casing.

It is another object of the present invention to provide a method andapparatus for deviating conductor casing without the necessity ofdriving the conductor casing in a slant, or the utilization of guidemembers.

It is yet another object of the present invention to provide a methodand apparatus for deviating drive pipe, surface casing, or the like,without having to preplan the position of guides in the substructure ofthe.

platform when the platform is constructed.

These, together with various ancillary objects and- BRIEF DESCRIPTION OFTHE DRAWINGS FIG. 1 is a side elevational view of an anchored marinestructure of a type contemplated including one fully set conductorcasing having a beveled end entirely enclosed by a shoe and extendingthrough guide members having an arcuate center line along the commonaxis of the respective guide members, and a second partially setconductor casing having a partial shoe covering the opening allowing anaperture for a jet means to emit high pressure fluid therethrough;

FIG. 2 is a partial enlarged view of the beveled end of a conductorhaving a shoe entirely covering the opening;

FIG. 3 is a horizontal sectional view taken along the plane of line 33in FIG. 2; and

FIG. 4 is a fragmentary enlarged view of a beveled end having a partialshoe attached thereto and a nozzle member extending through an openingfor angular emission of a high pressure fluid pumped from the surface ofthe earth.

DETAILED DESCRIPTION OF THE INVENTION Referring in detail now to thedrawings wherein like or similar parts of the invention are identifiedby like reference numerals, a marine structure, generally illustrated as10, is anchored in an off shore body of water 12 and includes a drillingdeck 14 having drilling equipment, generally illustrated as 16, attachedthereupon and including a rotary table 17. Marine structure 10 has adrilling aperture 18 in the drilling deck 14 and legs 20 supportablyattached to the deck 14 and extending downwardly to a bottom 22 in thewater 12.

Each of legs 20 includes anchoring piles 24 which extend longitudinallytherefrom. Piles 24 are slideably guided by legs 20 for imbedding into apenetratable substratum 26 to rigidly secure marine structure in place.Structure 10 may additionally include vertically spaced guide members 28and 30 which slideably receive a conduit conductor 32 and a plurality ofconduit conductors 34 as they are passed downwardly there through forbending beneath the bottom 22 and in the substratum 26. Guide members 28are generally vertically registered such as to have the respective guidemembers 28 axially aligned. Members 30 deviate from a general verticalalignment to define an essential arcuate center line along the commonaxis of the respective guide members 30. Conduit conductors 34 haveincremental lengths that interconnect with each other. One of theconduit conductors 34 has its lower end connected to the upper end ofthe conductor 32 and the remaining plurality of conduit conductors 34each have a lower end attaching to the upper end of a contiguous lowerconduit conductor 34 as the lower end is advanced downwardly withrespect to the drilling deck 14.

ln one embodiment of the invention (see FIG. 2) conductor 32 has abeveled end 36 having a horizontal plane occupying any suitable angularposition with respect to the vertical axis thereof. Preferably, theangular position which the horizontal plane of the beveled end occupieswith respect to the vertical axis is from between about 10 to about 85.A shoe member 38 attaches to beveled end 36 to entirely cover theopening thereof.

In a second embodiment of the invention (see FIG. 4) the beveled end 36has a partial shoe member 40 connecting thereto leaving an opending 42for internal communication with respect to the insides of the conduitconductor 32. A jet means, generally illustrated as 44, extendsinternally down conduit conductors 32 and 34 for feeding liquid from thesurface through the opening 42 for supplementing the deviation of theconductor 32 (and conductors 34) beneath the bottom 22 and in thesubstratum 36. Preferably, jet means 44 comprises a hose or pipe member46 having a nozzle 48 connected thereto.

With continual reference to the drawings for operation of the invention,the marine structure 10 is installed on the bottom 22 of the body ofwater 12. Conduit conductor 32 is subsequently extended through thedrilling aperture 18 downwardly relative to the drilling deck 14 untilit contacts the bottom 22. If the conductor 32 is not of sufficientlength to reach the bottom 22 (as in many off shore bodies of waterhaving great depths), then a plurality of interconnecting incrementallengths of the casing conductors 34 are added to conductor 32. In suchcases, one of the conductors 34 would have its lower end connecting tothe upper end of the conductor 32, and the remaining conductors 34 wouldeach have a lower end attaching to the upper end of a contiguous lowerconductor 34 as the lower ends thereof are advanced downwardly withrespect to the drilling deck 14 and into the substratum 26.

As aforementioned, conductor casing 32 may include a structure havingeither of two embodiments. In one embodiment, conduit conductor 32 hasthe shoe member 38 attached to the beveled end 36 and entirely coveringthe opening of the same. in another embodiment, conduit conductor 32 hasthe partial shoe member 40 attaching to the beveled end 36 leaving theopening 42 for internal communication with respect to the insides of theconductor. In this latter embodiment, the jet means 44 is extendedinternally down the conductors 34 and conductor 32 for feeding liquidsfrom the surface through the opening 42 at a high pressure. As was alsopreviously mentioned, the jet means 44 preferably comprises a nozzle 48,and a hose or pipe member 44 connecting to the nozzle 48 and extendingfrom the surface down through the insides of the conductors 34 andconductor 32. The beveled end 36 includes a horizontal plane (withrespect to the end 36) occupying an angular position of preferably frombetween about 30 to about with respect to the vertical axis thereof. Theconductor 32 (and the conductors 34) in this invention do not have to benecessarily precurved prior to their being driven into the substratum26.

After conduit conductor 32 and conductors 34 have been extended throughthe drilling aperture 18, they are subsequently driven beneath thebottom 22 and into the substratum 26 for bending therein. The drivingforce may be straight downward instead of at a slant. As the conductor32 is driven downward through the earth, it gradually starts to bend sothat it curves outward from the drilling deck 14. Bending occurs belowthe bottom 22 and in the substratum 26 and results from lateral forcesbeing applied against the shoe member 38 or 40 as the conductor 32resists being driven into the substratum 26. If the end of the conductor32 was not beveled, the resistive force would be only upward and therewould be no significant bending in a desired direction. Bending of theconductor 32 can be controlled by the orientation and the angle of thebevel of the beveled end 36. More specifically, the conductor 32 willbend in a direction which is away from the exposed face of the shoemember 38 and the extent of bending is determined by the beveled angle.As driving continues, the soil above the beveled end 36 can be reliedupon to some extent to provide lateral resistance against buckling ofthe conductor 32 and the conductors 34 which are attached thereto.

In the alternate embodiment of the invention, high pressure fluidexiting from the nozzle 48 of the jet means 44 is forcefully shot out atan angle to wallow out a tunnel ahead of the conductor 32 into which itis subsequently driven. Use of the alternate embodiment of the inventionreduces the force required to drive the conductor 32 and attachingconductors 34 downward and outward as they sink deeper and deeper intothe earth. Use of the alternate embodiment also provides a means forgreater curvature of the conductor 32 and attaching conductors 34 asthey are driven downwardly.

If needed, one or more means for guiding may be situated on thestructure to slideably receive the conductor 32 and conductors 34 asthey are passed downwardly therethrough. The means for guiding areattached to the platform at or above the mud line and provide additionalresistance to buckling. The guide means may comprise a plurality ofconductor casing guide members 28 vertically spaced apart and generallyvertically registered such as to have the respective guide members 28axially aligned, or guide means may include a plurality of conductorcasing guide members 30 also vertically spaced apart and deviating froma general vertical alignment to define an essentially arcu ate centerline along the common axis of the respective guide members 30. Thelatter guide means provides for more bending and deviation beneath thebottom 22, especially when the partial shoe-jet means is utilized.

Once the conductor has been driven to the desired depth (usually l00200feet within the earth) the shoe 38 or partial shoe 40 of the beveled end36 can be knocked off, blown off, or drilled through in order to providean open passageway for a drilling string which is utilized for slantdrilling towards a petroleum producing formation.

While the present invention has been described herein with reference toparticular embodiments thereof, a latitude of modification, variouschanges and substitutions are intended in the foregoing disclosure, andin some instances some features of the invention will be employedwithout a corresponding use of other features without departing from thescope of the invention as set forth.

We claim:

1. A marine structure anchored in an offshore body of water fordeviating conductor casing, or the like, comprising a drilling deckhaving at least one drilling aperture and situated above said body ofwater, at least one leg supportably attached to said drilling deck andextending downwardly to the bottom of said body of water, a pile meansslideably guided by said at least one leg and connected to saidstructure for imbedding in the substratum of said body of water torigidly secure said structure in place, and at least one first conductorcasing slideably situated within said drilling aperture for insertionand bending beneath said bottom and in said substratum, said firstconductor casing including a structure defining a conduit having abeveled end and a shoe member attaching to said beveled end and entirelycovering the opening thereof, said beveled end of said first conductorcasing bends in said substratum when driven into said same.

2. The marine structure of claim 1 additionally having attached theretoa means for guiding said first conductor casing, said guide meansslideably receives said first conductor as it is passed downwardlytherethrough.

3. The marine structure of claim 2 wherein a horizontal plane of saidbeveled end occupies an angular position of from between about to about85 with respect to the vertical axis thereof.

4. The marine structure of claim 3 additionally including a plurality ofinterconnecting incremental lengths of a second conductor casing, one ofsaid second conductors having its lower end connected to the upper endof said first conductor and the remaining of said plurality of saidsecond conductors each have a lower end attaching to the upper end of acontiguous lower second conductor as the lower end is advanceddownwardly with respect to said drilling deck and into said substratum.

5. The marine structure of claim 4 wherein said guide means comprises aplurality of conductor casing guide members vertically spaced apart andgenerally vertically registered such as to have the respective guidemembers axially aligned.

6. The marine structue of claim 4 wherein said guide means comprises aplurality of conductor casing guide members vertically spaced apart anddeviating from a general vertical alignment to define an essentialarcuate center line along the common axis of said respective guidemembers.

7. A marine structure anchored in an offshore body of water fordeviating conductor casing, or the like, comprising a drilling deckhaving at least one drilling aperture and situated above said body ofwater, at least one leg supportably attached to said drilling deck andextending downwardly to the bottom of said body of water, a pile meansslideably guided by said at least one leg and connecting to saidstructure for imbedding in the substratum of said body of water torigidly secure said structure in place, and at least one first conductorcasing slideably situated within said drilling aperture for insertionand bending beneath said bottom and in said substratum, said firstconductor casing including a structure defining a conduit haaving abeveled end, a partial shoe member attaching to said beveled end leavingan opening for internal communication with respect to the insides ofsaid first conductor, and a jet means extending internally down saidfirst conductor for feeding liquid from the surface through said openingat a high pressure for supplementing the deviation of said firstconductor beneath said bottom and in said substraturn.

8. The marine structure of claim 7 additionally having attached theretoa means for guiding said first conductor casing, said guide meansslideably receives said first conductor as it is passed downwardlytherethrough.

9. The marine structure of claim 8 wherein a horizontal plane of saidbeveled end occupies an angular position of from between about 10 toabout with respect to the vertical axis thereof.

10. The marine structure of claim 9 additionally including a pluralityof interconnecting incremental lengths of a second conductor casing, oneof said second conductors having its lower end connecting to the upperend of said first conductor and the remaining of said plurality of saidsecond conductors each have a lower end attaching to the upper end of acontiguous lower second conductor as the lower end is advanceddownwardly with respect to said drilling deck and into said substratum.

11. The marine structure of claim 10 wherein said guide means comprisesa plurality of conductor casing guide members vertically spaced apartand generally vertically registered such as to have the respective guidemembers axially aligned.

12. The marine structure of claim 10 wherein said guide means comprisesa plurality of conductor casing guide members vertically spaced apartand deviating from a general vertical alignment to define as essentialarcuate center line along the common axis of said respective guidemembers.

13. A method for deviating conductor case, or the like, comprising:

a. installing an anchored marine structure on the bottom of a body ofwater, said structure comprising a drilling deck having at least onedrilling aperture and situated above said body of water, at least oneleg supportably attached to said drilling deck and extending downwardlyto the bottom of said body of water, and a pile means slideably guidedby at least one leg and connected to said structure for imbedding in thesubstratum of said body of water to rigidly secure said structure inplace;

b. extending a first conductor casing through said drilling aperture anddownwardly relative to said drilling deck until contacting said bottomof said body of water, said first conductor casing including a structuredefining a conduit having a beveled end and a shoe member attaching tosaid beveled end and entirely covering the opening thereof; and

c. driving said beveled end of said first conductor casing beneath saidbottom and into said substratum for bending therein.

14. The process of claim 13 additionally including situating on saidstructure a means for guiding said first conductor casing, said guidemeans slideably receives said first conductor as it is passed downwardlytherethrough.

15. The process of claim 14 wherein a horizontal plane of said beveledend occupies an angular position of from between about l to about 85with respect to the vertical axis thereof.

16. The process of claim 15 additionally including adding to said firstconductor casing a plurality of interconnecting incremental lengths of asecond conductor casing, one of said second conductors having its lowerend connected to the upper end of said first conductor and the remainingof said plurality of said second conductors each have a lower endattached to the upper end of a contiguous lower second conductor as thelower end is advanced downwardly with respect to said drilling deck andinto said substratum.

17. The process of claim 16 wherein said guide means comprises aplurality of conductor casing guide members vertically spaced apart andgenerally vertically registered such as to have the respective guidemembers axially aligned.

18. The process of claim 16 wherein said guide means comprises aplurality of conductor casing guide members vertically spaced apart anddeviating from a general vertical alignment to define an essentiallyarcuate center line along the common axis of said respective guidemembers.

19. A method for deviating conductor case, or the like, comprising:

a. installing an anchored marine structure on the bottom of a body ofwater, said structure comprising a drilling deck having at least onedrilling aperture and situated above said body of water, at least oneleg supportably attached to said drilling deck and extending downwardlyto the bottom of said body of water, and a pile means slideably guidedby at least one leg and connected to said structure for imbedding in thesubstratum of said body of water to rigidly secure said structure inplace;

b. extending a first conductor casing through said drilling aperture anddownwardly relative to said drilling deck until contacting said bottom,said first conductor casing including a structure defining a conduithaving a beveled end, a partial shoe member attaching to said beveledend leaving an opening for internal communication with respect to theinsides of said first conductor; c. extending a jet means internallydown said first conductor for feeding liquid from the surface throughsaid opening at a high pressure; and

d. driving said beveled end from said first conductor casing beneathsaid bottom and into said substratum for bending therein while emittingsaid high pressure liquid through said opening for supplementing thedeviation of said first conductor beneath said bottom and in saidsubstratum.

20. The process of claim 19 additionally including situating on saidstructure a means for guiding said first conductor casing, said guidemeans slideably receives said first conductor as it is passed downwardlytherethrough.

21. The process of claim 20 wherein a horizontal plane of said beveledend occupies an angular position of from between about 10 to about withrespect to the vertical axis thereof.

22. The process of claim 21 additionally including adding to said firstconductor a plurality of interconnecting incremental lengths of a secondconductor casing, one of said second conductors having its lower endconnecting to the upper end of said first conductor and the remaining ofsaid plurality of said second conductors each having a lower endattaching to the upper end of a contiguous lower second conductor as thelower end is advanced downwardly with respect to said drilling deck andinto said substratum.

23. The process of claim 22 wherein said guide means comprises aplurality of conductor casing guide members vertically spaced apart andgenerally vertically registered such as to have the respective guidemembers axially aligned.

24. The process of claim 22 wherein said guide means comprises aplurality of conductor casing guide members vertically spaced apart anddeviating from a general vertical alignment to define an essentialarcuate center line along the common axis of said respective guidemembers.

1. A marine structure anchored in an offshore body of water fordeviating conductor casing, or the like, comprising a drilling deckhaving at least one drilling aperture and situated above said body ofwater, at least one leg supportably attached to said drilling deck andextending downwardly to the bottom of said body of water, a pile meansslideably guided by said at least one leg and connected to saidstructure for imbedding in the substratum of said body of water torigidly secure said structure in place, and at least one first conductorcasing slideably situated within said drilling aperturE for insertionand bending beneath said bottom and in said substratum, said firstconductor casing including a structure defining a conduit having abeveled end and a shoe member attaching to said beveled end and entirelycovering the opening thereof, said beveled end of said first conductorcasing bends in said substratum when driven into said same.
 2. Themarine structure of claim 1 additionally having attached thereto a meansfor guiding said first conductor casing, said guide means slideablyreceives said first conductor as it is passed downwardly therethrough.3. The marine structure of claim 2 wherein a horizontal plane of saidbeveled end occupies an angular position of from between about 10* toabout 85* with respect to the vertical axis thereof.
 4. The marinestructure of claim 3 additionally including a plurality ofinterconnecting incremental lengths of a second conductor casing, one ofsaid second conductors having its lower end connected to the upper endof said first conductor and the remaining of said plurality of saidsecond conductors each have a lower end attaching to the upper end of acontiguous lower second conductor as the lower end is advanceddownwardly with respect to said drilling deck and into said substratum.5. The marine structure of claim 4 wherein said guide means comprises aplurality of conductor casing guide members vertically spaced apart andgenerally vertically registered such as to have the respective guidemembers axially aligned.
 6. The marine structue of claim 4 wherein saidguide means comprises a plurality of conductor casing guide membersvertically spaced apart and deviating from a general vertical alignmentto define an essential arcuate center line along the common axis of saidrespective guide members.
 7. A marine structure anchored in an offshorebody of water for deviating conductor casing, or the like, comprising adrilling deck having at least one drilling aperture and situated abovesaid body of water, at least one leg supportably attached to saiddrilling deck and extending downwardly to the bottom of said body ofwater, a pile means slideably guided by said at least one leg andconnecting to said structure for imbedding in the substratum of saidbody of water to rigidly secure said structure in place, and at leastone first conductor casing slideably situated within said drillingaperture for insertion and bending beneath said bottom and in saidsubstratum, said first conductor casing including a structure defining aconduit haaving a beveled end, a partial shoe member attaching to saidbeveled end leaving an opening for internal communication with respectto the insides of said first conductor, and a jet means extendinginternally down said first conductor for feeding liquid from the surfacethrough said opening at a high pressure for supplementing the deviationof said first conductor beneath said bottom and in said substratum. 8.The marine structure of claim 7 additionally having attached thereto ameans for guiding said first conductor casing, said guide meansslideably receives said first conductor as it is passed downwardlytherethrough.
 9. The marine structure of claim 8 wherein a horizontalplane of said beveled end occupies an angular position of from betweenabout 10* to about 85* with respect to the vertical axis thereof. 10.The marine structure of claim 9 additionally including a plurality ofinterconnecting incremental lengths of a second conductor casing, one ofsaid second conductors having its lower end connecting to the upper endof said first conductor and the remaining of said plurality of saidsecond conductors each have a lower end attaching to the upper end of acontiguous lower second conductor as the lower end is advanceddownwardly with respect to said drilling deck and into said substratum.11. The marine structure of claim 10 wherein said guide means comprisesa plurality of conductor casing guide members vertically sPaced apartand generally vertically registered such as to have the respective guidemembers axially aligned.
 12. The marine structure of claim 10 whereinsaid guide means comprises a plurality of conductor casing guide membersvertically spaced apart and deviating from a general vertical alignmentto define as essential arcuate center line along the common axis of saidrespective guide members.
 13. A method for deviating conductor case, orthe like, comprising: a. installing an anchored marine structure on thebottom of a body of water, said structure comprising a drilling deckhaving at least one drilling aperture and situated above said body ofwater, at least one leg supportably attached to said drilling deck andextending downwardly to the bottom of said body of water, and a pilemeans slideably guided by at least one leg and connected to saidstructure for imbedding in the substratum of said body of water torigidly secure said structure in place; b. extending a first conductorcasing through said drilling aperture and downwardly relative to saiddrilling deck until contacting said bottom of said body of water, saidfirst conductor casing including a structure defining a conduit having abeveled end and a shoe member attaching to said beveled end and entirelycovering the opening thereof; and c. driving said beveled end of saidfirst conductor casing beneath said bottom and into said substratum forbending therein.
 14. The process of claim 13 additionally includingsituating on said structure a means for guiding said first conductorcasing, said guide means slideably receives said first conductor as itis passed downwardly therethrough.
 15. The process of claim 14 wherein ahorizontal plane of said beveled end occupies an angular position offrom between about 10* to about 85* with respect to the vertical axisthereof.
 16. The process of claim 15 additionally including adding tosaid first conductor casing a plurality of interconnecting incrementallengths of a second conductor casing, one of said second conductorshaving its lower end connected to the upper end of said first conductorand the remaining of said plurality of said second conductors each havea lower end attached to the upper end of a contiguous lower secondconductor as the lower end is advanced downwardly with respect to saiddrilling deck and into said substratum.
 17. The process of claim 16wherein said guide means comprises a plurality of conductor casing guidemembers vertically spaced apart and generally vertically registered suchas to have the respective guide members axially aligned.
 18. The processof claim 16 wherein said guide means comprises a plurality of conductorcasing guide members vertically spaced apart and deviating from ageneral vertical alignment to define an essentially arcuate center linealong the common axis of said respective guide members.
 19. A method fordeviating conductor case, or the like, comprising: a. installing ananchored marine structure on the bottom of a body of water, saidstructure comprising a drilling deck having at least one drillingaperture and situated above said body of water, at least one legsupportably attached to said drilling deck and extending downwardly tothe bottom of said body of water, and a pile means slideably guided byat least one leg and connected to said structure for imbedding in thesubstratum of said body of water to rigidly secure said structure inplace; b. extending a first conductor casing through said drillingaperture and downwardly relative to said drilling deck until contactingsaid bottom, said first conductor casing including a structure defininga conduit having a beveled end, a partial shoe member attaching to saidbeveled end leaving an opening for internal communication with respectto the insides of said first conductor; c. extending a jet meansinternally down said first conductor for feeding liquid from the surfacethrough said opening at a hIgh pressure; and d. driving said beveled endfrom said first conductor casing beneath said bottom and into saidsubstratum for bending therein while emitting said high pressure liquidthrough said opening for supplementing the deviation of said firstconductor beneath said bottom and in said substratum.
 20. The process ofclaim 19 additionally including situating on said structure a means forguiding said first conductor casing, said guide means slideably receivessaid first conductor as it is passed downwardly therethrough.
 21. Theprocess of claim 20 wherein a horizontal plane of said beveled endoccupies an angular position of from between about 10* to about 85* withrespect to the vertical axis thereof.
 22. The process of claim 21additionally including adding to said first conductor a plurality ofinterconnecting incremental lengths of a second conductor casing, one ofsaid second conductors having its lower end connecting to the upper endof said first conductor and the remaining of said plurality of saidsecond conductors each having a lower end attaching to the upper end ofa contiguous lower second conductor as the lower end is advanceddownwardly with respect to said drilling deck and into said substratum.23. The process of claim 22 wherein said guide means comprises aplurality of conductor casing guide members vertically spaced apart andgenerally vertically registered such as to have the respective guidemembers axially aligned.
 24. The process of claim 22 wherein said guidemeans comprises a plurality of conductor casing guide members verticallyspaced apart and deviating from a general vertical alignment to definean essential arcuate center line along the common axis of saidrespective guide members.